/Engine/Source/Runtime/Core/Public/Math/RotationMatrix.h
Builds a rotation matrix given only a ZAxis. X and Y are unspecified but will be orthonormal. ZAxis need not be normalized.
static [TMatrix](API\Runtime\Core\Math\TMatrix)< T > MakeFromZ ( [TVector](API\Runtime\Core\Math\TVector)< T > const & ZAxis )